命令名称：read_device_variables_unit

命令ID：4290

命令号：142

命令操作：cmdOpRead

命令中事务个数：1

事务列表

    事务号：0

    事务中请求数据列表

无

    事务中响应数据列表

条目类型	标识	掩码	整数	浮点	变量ID
cmdDataReference	cmdDataItemFlg_None	0	0	0	response_code
cmdDataReference	cmdDataItemFlg_None	0	0	0	device_status
cmdDataReference	cmdDataItemFlg_None	0	0	0	Velocity_flow_unit
cmdDataReference	cmdDataItemFlg_None	0	0	0	Volume_flow_unit
cmdDataReference	cmdDataItemFlg_None	0	0	0	Mass_flow_unit
cmdDataReference	cmdDataItemFlg_None	0	0	0	Total_1_unit
cmdDataReference	cmdDataItemFlg_None	0	0	0	Total_2_unit
cmdDataReference	cmdDataItemFlg_None	0	0	0	Total_3_unit
cmdDataReference	cmdDataItemFlg_None	0	0	0	Time_unit
cmdDataReference	cmdDataItemFlg_None	0	0	0	Volume_flow_unit_disp
cmdDataReference	cmdDataItemFlg_None	0	0	0	Mass_flow_unit_disp